APIs › Agent & Developer Utilities › Regex Tester

Regex Tester

Tests a regular expression against sample text with named groups, spans and flags, under a hard timeout that blocks catastrophic backtracking.

POST /v1/developer/regex-test $0.005 per call

Specification

Endpoint

POST /v1/developer/regex-test

Price

$0.005 per call · tier basic_data

Payment

x402 on X Layer (chain 196) · settled in USDG or USDT0 · schemes exact, aggr_deferred

Data source

Deterministic local computation on caller-supplied input

Timeout

15 seconds

Max request

2 MB

Version

1.0.0

Calling it

The first call returns a 402 with the payment challenge. Retry with a signed authorisation in the X-PAYMENT header — see the payment guide for the exact shape.

curl -i -X POST "https://api.dana-edu.pp.ua/v1/developer/regex-test" \
  -H "content-type: application/json" \
  -d '{ ... }'

Response

Real output, captured by running this endpoint at build time — not written by hand. Volatile fields such as timestamps are elided. Captured 2026-07-30.

{
  "pattern": "(?P<user>[\\w.]+)@(?P<domain>[\\w.]+)",
  "mode": "findall",
  "flags_applied": [],
  "match_count": 2,
  "group_names": [
    "user",
    "domain"
  ],
  "group_count": 2,
  "matches": [
    {
      "index": 0,
      "match": "dana@example.com",
      "start": 9,
      "end": 25,
      "groups": {
        "user": "dana",
        "domain": "example.com"
      },
      "positional_groups": [
        {
          "index": 1,
          "value": "dana",
          "start": 9,
          "end": 13
        },
        {
          "index": 2,
          "value": "example.com",
          "start": 14,
          "end": 25
        }
      ]
    },
    {
      "index": 1,
      "match": "sales@bazaar.io",
      "start": 29,
      "end": 44,
      "groups": {
        "user": "sales",
        "domain": "bazaar.io"
      },
      "positional_groups": [
        {
          "index": 1,
          "value": "sales",
          "start": 29,
          "end": 34
        },
        {
          "index": 2,
          "value": "bazaar.io",
          "start": 35,
          "end": 44
        }
      ]
    }
  ],
  … truncated for display

Trimmed for display. The full body is returned by the endpoint and described by its schema.

Every response is wrapped in the same envelope: data plus warnings, sources, confidence, informational_only and a measured processing_ms. See the envelope reference.

Related endpoints